Temporary Entries

The hard X-ray beamline (Aramis) of the Swiss free-electron laser (SwissFEL) hasbeen in user operation since the end of 2017 and its performance has been continuouslymonitored and enhanced over the past eight years. From the beginning, spontaneousradiation has been utilized to monitor the behavior of its 13 individual undulatormodules: the pointing direction of the electron beam in each module, their alignmentrelative to the electron beam, and the calibration of their magnetic field strength (Kcalibration). [...]

Understanding and diagnosing the state of a particle accelerator requires navigating high-dimensional control system data, often involving hundreds of interdependent parameters. We propose a novel multimodal embedding framework that jointly learns representations of machine states from both numerical control system readouts and natural language descriptions. [...]

Strong, symmetrically focusing plasma lenses are promising for accommodating the small beams associated with plasma-based accelerators and collider final foci. However, while focusing with active and passive plasma lenses has been experimentally demonstrated, compatibility with high-brightness beams relevant for applications has not. [...]

In the framework of the recent FLASH2020+ upgrade program, the longitudinal electron beam diagnostics of the FLASH accelerator had been modernized and extended by additional devices, including an electro-optical bunch length detector (EOD), as well as an additional bunch compression monitor (BCM) and a bunch arrival-time monitor BAM) in the new direct seeding beamline FLASH1. Also, the THz intensity spectrometer (CRISP) received a modernized control interface that will allow non-experts to perform bunch profile measurements.The paper presents an overview on the current status of the longitudinal electron beam diagnostics at FLASH and the ongoing (re-)commissioning..

A future upgrade of the European XFEL foresees High-Duty-Cycle (HDC) operation which requires a new electron beam injector. The centerpiece of such a photoinjector is a continuous wave (CW) L-band superconducting radio frequency (SRF) cavity developed at DESY. [...]

Laser-induced periodic surface structures (LIPSS) were obtained on Si substrates using various number of ultrashort laser pulses with 266 fs pulse width at a 1030 nm wavelength. The obtained structures were investigated with SEM, EDS and optical spectroscopy techniques, then the obtained results were simulated by theoretical calculations. [...]

We report on the photoinduced spin crossover (SCO) transition from a 2HS-2LS to a 3HS-1LS state in a [2x2] Fe(II) metallogrid complex using molecular crystals with static photocrystallography at a first ever attempt in the beamline P11 of the PETRA III synchrotron, DESY. A class 3B diode laser was used to induce the transition under controlled irradiation conditions. [...]

Structural insights into protein-ligand interactions are essential for advancing drug development, with macromolecular X-ray crystallography being a cornerstone technique. Commonly X-ray data collection is conducted at cryogenic temperatures to mitigate radiation damage effects. [...]

Large-scale synchrotron facilities, such as PETRA III, are essential for modern scientific discovery. Increasing data throughput and endorsement of FAIR data principles significantly drive the operational costs for associated data centers. [...]